/*!	 synfig/rendering/common/task/taskblend.h
**	 TaskBlend Header
**
**	......... ... 2015 Ivan Mahonin
**
**	This package is free software; you can redistribute it and/or
**	modify it under the terms of the GNU General Public License as
**	published by the Free Software Foundation; either version 2 of
**	the License, or (at your option) any later version.
**
**	This package is distributed in the hope that it will be useful,
**	but WITHOUT ANY WARRANTY; without even the implied warranty of
**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
**	General Public License for more details.
**
*/

#ifndef __SYNFIG_RENDERING_TASKBLEND_H
#define __SYNFIG_RENDERING_TASKBLEND_H

#include "../../task.h"
#include "tasktransformationpass.h"

namespace synfig
{
namespace rendering
{

class TaskBlend: public Task, public TaskTransformationPass
{
public:
    typedef etl::handle<TaskBlend> Handle;

    Color::BlendMethod blend_method;
    Color::value_type amount;

    TaskBlend():
        blend_method(Color::BLEND_COMPOSITE), amount(1.0) { }
    Task::Handle clone() const
    {
        return clone_pointer(this);
    }

    const Task::Handle& sub_task_a() const
    {
        return sub_task(0);
    }
    Task::Handle& sub_task_a()
    {
        return sub_task(0);
    }

    const Task::Handle& sub_task_b() const
    {
        return sub_task(1);
    }
    Task::Handle& sub_task_b()
    {
        return sub_task(1);
    }

    VectorInt get_offset_a() const;
    VectorInt get_offset_b() const;

    virtual Rect calc_bounds() const;
};

} /* end namespace rendering */
} /* end namespace synfig */

#endif